第18题: [单项选择]The development of the transistor and integrated circuits revolutionized the electronics industry by allowing components to be packaged more {{U}}densely{{/U}}. A. compactly B. inexpensively C. quickly D. carefully 参考答案:A 答案解析:densely:密集地;浓厚地。与compactly(紧密地;紧凑地)意思相近。We should store food more compactly in the refrigerator in o